Polishing machine



Dec. 13, 1927.

Sheets-Sheet 2 [W1/@nior- L, P. HALLADAY POLISHING MACHINE ha 1\ E RD Zewz' ZUM/ZZ L. P; HALLADAY POLISHIIIG MACHINE Filed 'Dern 13, 1927.

Dec. 13, 1927.

v A 1,652,436 L. P. vI-UI\I.LA|::AY

POLISHIIIG MACHINE l y Filed May 12, 1924 6 Sheets-Sheet 4 Dec. 13, 1927.

l.. P. HALLADAY romanze MACHINE 6 SheetSfSheet 5 Filed May 12. m24

Dec. 13, 1927. 1,652,436 L. P. HALLADAY l POLISHING MACHINE Filed May 12. 1924 G Sheets-Sheet 6 Patented Dec. 13, 1927.

rams r. HALLADAY, or Daemon., nmnrors.

:Pomsnme macnnm appuoauonmea my 12,

to provi e a new and improved form of machine forpolishing or buiing automobile bumper bars or the like or any similar elongated piece of work wherein it is necessary to polish or buff long narrow exposed surfaces. Another object of my invention is to provide a polishing machine wherein the polishing operation may be continuous on a series of pieces of work successively and simultaneously going through the machine. Another object of my invention is to provide means for changing and renewing the polishing elements without interfering with the operation of the machine. Another object is to provide a machine wherein pieces to be polished may be fed in an taken out as the work is done without interfering with the work on the balance of the pieces. Other objects will appear from time to time in the specification and claims.

My invention is illustrated more or less diagrammatically in the accompanying drawings, wherein-#- Figure 1 is a side elevation of the feed end of the machine;

Figure 2 is a side elevation of the continuation of Figure 1 showing the discharge end of the machine;

Figure 3 is a side elevation on an enlarged -scale showing details;

Figure 4 is a plan view showing one of the polishing elements;

Figure 5 is a section along the line 5-5 of F1gure 3 on an enlarged scale;

Figure 6 is a section on an enlarged scale along the line 6-6 'of Fig. 3 showing parts in elevation;

Figure 7 is a detail on a larger scale of a part of the showing in Figure 6;

Figure 8 is a plan View of the end of the track; p

Figure 9 is a side elevation of parts shown in F1gure 8;

Figure 10 is a section alongthe line 10-10 in Figure 8;

Like parts are indicated by like characters throughout.

A is a head end bearing frame, A1 a tail end bearing frame, -A1 a work track, A3 a return track interposed bet-Ween the frames A A1. AI is a drivin sprocket on the head end bearing frame A5 a tail sprocket on the tail end bearing frame A1. A is an endless chain traveling about the sprockets 1924. serial no. 712,532.

A4 A and riding on the tracks' A A. This chain carries the work on its upper range along the work track A and returns empty on the lower return track A. The track A2 is in line with the vsprockets A* Ali being .just slightly below the 'pitch line thereof. The track A3 is bent upwardly at its ends and comes outside the pitch line of the sprockets A* A and has extensions A1 extending upwardly into line with the track A2 on the opposed sides of the sprockets A* A to more effectively guide the chain. The track A is made up of two separate T rails having the web downwardly extended. It is mounted on brackets A'r on the fra-mes A A1 and on Ubrackets A projecting outwardly from the frames A. These frames are spaced along the track between the frames A A1. These frames also carry the T-rails forming the track A2, there being brackets A1 on the frames A to.cal ry them. There is thus clearance between the two elements of the track A2 so Vthat the downwardly depending parts of a chain may pass between the two elements of the track.

`Referring to Figures 8, 9 and 10, particularly, B is a drive shaft carried in bearings B1 on theframe A. This drive shaft 1s square and slidably engages the sprocket A which is held against rotation thereon. B is a sprocket keyed to the shaft B driven by means of a sprocket chain B through a reduction gear B4 from .the motor B. Rotation of this shaft and sprocket drives the chain A which travels along the tracks A1A. B" is a slotted drum associated with the sprocket A". The slot on this drum is rotatably engaged by a fork B8 which fork projects from a web plate B which ties the two T-rails forming the track A together at their ends and limits inward movement of the sprocket with respect to the track, thus correctly positioning the sprocket and the track. The arrangement is the same at the other end except that there no provision is made for applying power vto the tail shaft.

The chain A6 maybe made up of any suitable form of link belt and carries a series of carriages C having four rollers C1 C1 flanged to ride, two of them along each of the track forming rails. These carriages are closely spaced in pair on the chain, there being between them two roller carriages C having rollers C3 each engaging one of the track elements. These two roller carriages are held against rotation by the chain and los have upwardly projecting struts C thereon. As the carriages C are disposed upon the chain, the front carriage of each pair is the following carriage, the rear carriage, the leading carriage with reference to the work supported thereby. Each leading carriage has a lug C5 projecting upwardly therefrom. Projecting at right angles from this lug and scpaced above the carriage is a holding bar Associated with the holding bar and s aced forwardly from it is a holding finger 7 and at the end of the bar is a forwardly projecting lug C8. C is the work taking in this case the form of a. spring steel automobile bumper impact bar having its ends bent in a kind of shepherds crook arrangement, the loop thus formed engages the bar Cf passing under the linger C7 which holds it against forward movement and located at one side of the lug C8 which holds it against lateral movement. Obviously this bumper bar is free to rotate on the holding bar and when introduced from an angle to the rear, its edge can be placed between the bar or pin and finger and when it is rotated into parallelism with the chain, it drops down to one side of the lug and is held in place. Each of the following carriagesA C has two upwardly projecting fingers C1", one on either side. If the work is raised up` at the rear end, it can be swung into line with these fingers, then dropped down between them and in this position is rotated to travel along the train and be worked upon. It is held against longitudinal displacement by the leading carriage and against lateral displacement by the following carriage. The bar also rests intermediate its ends upon the struts C* projecting upwardly from the two roller carriages and is free to move laterally along them and also along the following carriage as it bends-or gives under the influence of the buliing wheel which does the work. As above suggested, the struts C4, the fingers C10 and the lugs C5 are free to travel between the two track elements on the return path hanging down between them as indicated in Figure 3. The chain is so attached to these carriages that they ride around the sprockets at both ends with the chain without interference and the extensions A1 on the lower track guide the carriages'around the sprockets so as to avoid any undue interference or jerking or displacement of parts.

The track A2 is made up as previously indicated of a pair of parallel T-rails with the web downwardly depending. These webs are joined together by spacing bars D which are bolted between the rail webs by means of bolts D1 which also hold roller brackets D2, one on either side of the track in place with respect thereto. These brack ets have rollers D3 adapted to travel along the upper surface of the brackets A1 in a direction perpendicular to the axls of the track. D* is an eccentric shaft extendin along the entire length of the track A2 'and journalled on the frames A. This eccentric shaft carries spaced therealong a plurality of eccentrics D5 which carry eccentric rods D6 pivoted to ears D'I on the track, A2 So that rotation of the eccentric shaft causes the entire track A2 to move back and forth perpendicular to its axis as a unit. This eccentric shaft is rotated in unison with the rotation of the drive shaft B at a relatively low rate so that the lateral movement of the track is gradual but continuous back and forth during operation.

Mounted on each of the frames A are A- frames E on which are j ournalled the buffer frames El. These buffer frames are stiilened by cross ribs E2 E2 and are provided at their outer free ends with bearings E* carrying a buffer shaft E5. Intermediate the bearings E4 keyed to eachshaft E5 is a belt pulley E6. E7 E7 are buffer wheels removably mounted on each of the shafts Es and overlying the chain, track -and work. EB is a motor located between the frames E concentric with the axis of rotation of the frame E1 and provided with a belt wheel E9 driving a belt E10 which travels over the pulley E6.

F is a C-bracket projecting upwardly from the frame A and supported at its free end by a strut F1, just in front of the A- frames E. F2 is a counter-balance lever pivoted on the bracket F. It is engaged at its free end by the bail F3 on the frame E1 and projects rearwardly beyond the motor Es at 4 to carry a counter-balance weight F5 and supporting rod F". This counter-balance weight is so larranged as to permit the grinding or buiiing head or wheel to press downwardly on the work with about twentyve pounds pressure. F7 is a push rod pivoted on the frame E1 adjacent its free end and carried by a latch lever F 9 pivoted on the frame A having a foot pedal F10. This lever is loosely pivoted and may be swung sideward when depressed to engage a latch F11 so as to hold the bufiing wheel out of contact with the work until the latch is released.

G is an air duct supported on the brackets F discharging into the suction faIrG1 driven by a belt from any suitable source of power applied to the pulley G2. This fan discharges dust laden air to any suitable separating means not-here shown. G2 G3 are iiexible pipes communicating at one end with the duct G and at the other end with the housings G* enclosing the buiing wheels E". These housings Gr4 have pivoted doors G5 which maybe swung aside to gain access to the bufling wheels when it is desired to renew them. G6 GG are adjustable stops limiting the downward movement of the builing wheels under the inlluence of the twenty.v l'

linfames ve pounds ressure above referred to so as to prevent t ese wheels dropping too far down between their engagement with successive lpieces of work. the fork Bs projecting from the track with the drum B7 insures that .as the track moves laterally the drum, sprocket, and chain will travel with it causing the drum and sprocket to slide -on the squared shaft without interfering with the drive of the chain.

It will be evident that while I have shown in my drawings', an operative device, lstill many-changes might be madetn -the size, shape and arrangement of parts without departing materially from the spirit of my invention. I wish, therefore, that my showing be taken as in a sense diagrammatic.

The use and operation of my invention are as follows:

With the chain in operation moving forward along its working track and with the separate motors each driving separately a` .builing wheel and with the working track oscillating in a direction erpendicular to its axis and with the suctlon fan at work ready to carry away the dust from the buff- -pig wheels, the apparatus is ready for opera- 1on. Y

The'operator at the-tail end of the chain will pick up lsuccessive bumper bars or other pieces of work holding them at an angle to4 the axial line of the track, he will engage'the j front loop on the bumper bar beneath the uide hook, will then swing the bumper bar 1n line with the chain bringing the hook thereon behind the lug on the holding bar. He then lowers the work so that the rear end, rests on the rear carriage between the two upwardly projecting lugs. The work is positively but loosely he d in position free to move longitudinally and to give with the chain and with the progress of the work, the bar being supported vintermediate itsl ends by the upwardly' projecting struts. This enagement is made while the chain is movmg forward. As the chain goes forwardit carries this bar underA successive rotating buiing wheels. The wheels ride up around the curved end of the bumper bar at the front end, pass alon the impact face and at the end drop do f2b ward movement lynthe adjustable stops. Each successive bu g wheel thus works on the entire length of the bar. The bar as it passes along 1s movedl back and forth in a l direction perpendicular to its axis across the face of the wheel. Thisgives even wear of.

the wheel and even polishing vof the bar. The dust from the buiiing action is drawn into the hood surrounding the wheel by the inrush of air and"thence through the dust catching system. At the head end ofthe chain an operator reverses the process and takes the bumper bar'or other owork oil' the chain, leavingthe chain to go down under- The engagement of t eing limited in downneath on the fixed Vreturn track. There is 'suilicient exibility in the chain so that the return track does not need to vibrate in unison with the upper or working track.

The buing wheels wear away rapidly and the operators manipulate the stops to insure l that as the wheels wear'they will always be allowed to come down far enough to properly engage the work. The operators also during the running of the machine are con'- kstantly engaged in changing the worn buffer Wheels and replacing them with new wheels. As shown, there are ten wheels. Eight are enough to do the work so that two wheels can be out of commission at all times being replaced. The operator replaces a wheel by putting his foot on the latch lever, rotating the bufing frame up about its axis, swinging the lever under the stop to lock the wheel out of contact. He then stops the motor, swings open the door on the air hood, unscrews the nut which holds the wheel in place, removes it, inserts a new wheel, closes the door, starts the motor, adjusts the stop,

releases the latch and the wheel is again 1ntime without interfering with the operation y leaving enollgIlI-il wheels in action to do satisfactory bu the work is continuous and buifed bumper bars or .other work are fed constantly through the machine and discharged at the head end in a finished condition so far as this particular machine is concerned.

In my claims I have used the terms grinding machine and grinding wheel in the broadest sense of the word. The invention is primarily intended for builing or polishing and the wheels are normally canvas or fabric builing or polishin wheels. Buiiing and polishing is a grin ing action and it is obvious that the builing wheel is a grinding wheel in the broad sense of the word because it d'oes grind as Lit polishes.

I claim:

1. In a grinding machine, a pivot frame, a grinding wheel rotatably mounted thereon,

a motor carried thereby, a driving connection between it and the wheel, means for giving the .wheel and work relative movement brought into engagement with the lever to lock the push rod and lever in raised position.

2. In a grinding machine, a plurality of spaced grinding wheels, means for feeding means for propelling it laterall work continuousl into working engagement with each of said wheels in succession, said means comprising an endless chain upon which the work is mounted, means for yieldingly holding the wheels against the Work and means for limiting the movement of the wheels toward the work between engagement with successive pieces of work, means for moving the work laterally during its feed toward and past the wheels.

3. In a grinding machine, a track, means for reciprocating it in a direction perpendicular to its longitudinal axis, a chain and means for propelling it laterall therealong, work carrying means adaptedy to be propelled along the track by the chain and a plurality of separate grinding wheels arranged along the track and adapted to successively engage successive pieces of work.

el. In a grinding machine, a track, means for reciprocating it in a direction perpendicular to its longitudinal axis, a chain and means Vfor propelling it laterally therealong, work carrying means adapted to be propelled along the track by the chain and a plurality of separate grinding wheels arranged along the track and adapted to successively engage successive pieces of work, a return track for the chain approximately in line with the reciprocating track and held against recip rocation. p

5. In a grinding machine, a track, means for reciprocating it in a direction perpendicular to its longitudinal axis, a chain and therealong, work carrying means adapte to be propelled along the track by the chain and a plurality of separate grinding wheels arranged along the track and adapted to successively engage successive pieces of Work, a return track for the chain approximately in line with the reciprocating track and held against reciprocation, means at either end of said tracks for guiding the chain from one track to the other.

6. In a grinding machine, a track, means for reciprocating it in a direction perpendicular to its longitudinal axis, a chain and means for propelling it laterally therealong, work carrying means adapted to be propelled along the track by the chain and a plurality of separate grinding wheels arranged along the track and adapted to successively en age successive pieces of work, the prope ling means comprising a drive shaft, a

.chain sprocket slidable thereon and held against rotation thereby and means interposed between. the reci rocating track and the sprocket for imparting the reciprocating movement of the track to the sprocket.

In a grinding machine, a track, means for reciprocating it in a direction perpendicular to its longitudinal axis, a chain and means for propelling it laterally therealong, work carrying means adapted to be propelled along the track by the chain and a plurality of 4separate grinding wheels arranged along the track and adapted to successively engage successive pieces of work, the propelling means comprising a drive shaft, a chain sprocket slidable thereon and held against rotation thereby and means in ter osed between the reciprocating track and the sprocket for impartlng the reciprocating movement of the track to the sprocket, said means comprising a forked element mounted on the track rotatably engaging the sprocket.

8. In a grinding machine, a track, means for reciprocating it in a direction perpendicular to its longitudinal axis, a chain and means for propelling it laterally therealong, work carrying means adapted to be propelled along the track by the chain and a plurality of separate .grinding wheels arranged along the track and adapted to suc-l cessively engage successive pieces of work, the reciprocating means comprising an eccentric shaft parallel with the track and a. plurality of eccentrics thereon spaced along the track, connections between the track and the eccentrics whereby the trackis given a. parallel movement throughout its entire length.

9. In a grinding machine, a track, means for reciprocating it in a direction perpen dicular to its longitudinal axis, a chain and means for propelling it laterally therealong, work carrying means adapted to be propelled along the track by the chain and a plurality o f separate grinding wheels arranged along the track and adapted to successively engage successive pieces of Work, supporting brackets for the track arranged perpendicular to the axis thereof and rollers interposed between the track and the brackets.

10. In a grinding machine, a track, means for reciprocating it in a direction perpendicular to its longitudinal axis, a chain and means :for propelling it laterall therealong, work carrying means adapte to be propelled .along the track by the chain .and a plurality of separate grinding wheels arranged along the track and adapted to successively engage successive pieces of work, the propelling means comprising a drive shaft, a chain sprocket slidable thereon and held against rotation thereby and means interposed between the reciprocating track and the sprocket for imparting` the reciprocating movement of the track to the sprocket supporting brackets for the track arrange rpendicular to the axis thereof and rol ers interposed between the track and the brackets.

l1. In a grinding machine, porting brackets therefor perpendicular thereto, rollers interposed between them, sprockets associated with either end of the a track, sup

bracket held against 4transverse movement with respect to the track, a chain travellin along the track and over the sprockets an means for imparting reciprocation to the jectin work supporting lug.I

17. n a transmisslon, a supporting trackv 'adapted to travel therea ong,

track in a direction perpendicular to its axis.

12.V In a grinding machine, a track, supporting brackets `therefor perpendicular thereto, rollers interposed between them, sprockets associated with either end of the track held against transverse movement with respect to the track, a chain travelling along the track and over the sprockets Iand means for imparting reciprocation to the track in a direction perpendicular to its axis, a return track for the chain independent of the reciprocating track having extensions projectin upwardly around the sprockets.

13. he combination with a track `of a plurality of work supporting carriages adapted to travel therea ong, one havin a transverse holding pin with a hook para lel to and in front of it and a lu projecting forward from the other end o it, another having a pair of upwardly projecting spaced lugs and an intermediate carriage having an upwardly projectin work supporting lug and a chain to hol the carria es in fixed relation and propel them along t e track.

14. The combination with a track of a plurality of work supporting carriages one having a transverse holding pin with a hook parallel to and in front of it and a lug projecting forward from the other end of it, another having a pair of upwardly projecting spaced lugs and a chain to hold the carriages in ixed relation and propel them along the track.

15. The. combination with a track of a plurality of work supporting carriages adapted to travel therealong, one of them having means to engage loosely and hold the work against longitudinal and angular displacement, the other having means to hold the work while permitting longitudinal but preventing lateral displacement and a chain to hold the carriages in fixed relation and propel them along the track.

16. The combination with a track of a plurality of work supporting carriages adapted to travel therealong, one of them havlng means to engage loosely and hold the work against longitudinal and angular displacement, the other having means to holdthe work while permitting longitudinal but preventing lateral displacement'and a chain to hold the carriages in fixed relation and el them along the track and an interate carriage having an upwardly proand a drive shaft rotatable therein, a s ocket free to slide longitudinally thereon an held against rotation with respect thereto, a track moves along the shaft in unison with Athe trackand a chain travelling along the track and over the sprocket.

' 18. In a transmission, a supporting trackv and a drive shaft vrotatable therein, a sprocket free to slide longitudinally thereon and held against rotation with respect thereto, a track at right angles to the shaft and means for moving it laterally, a connection between the track and sprocket whereby the sprocket moves along the shaft .in unison with the track and a chain travelling along the track and over the sprocket, a return track fixed in position and adapted to receive the chain from the sprocket at all positions of the movable track and sprocket.

A 19. In a transmission, a supporting track and v a drive shaft rotatable therein, a sprocket free to slide longitudinally'thereon and held against rotation with respect thereto, a track at right angles to the shaft and means for moving it laterally, a connection between the track and s rocket whereby the sprocket moves along t e shaft in unison`l with the track and a chain travellin along the track and over the sprocket, t e connection between the track and sprocket comprising a peripherally slotted drum associated with thersprocket and a fork carried by the track and rotatably engaging the slot in the drum.

20. In a grinding machine, a track, a chain movable longitudinally thereon, a series of carriages propelled by the chain along the track and means on the carriages for holding separate pieces of work at one end, the j free end of, the work being free to `move longitudinally but held against angular displacement.

Kss

21. In a grinding machine, a track, a

chain movable longitudinally thereon, a series of carriages propelled b the chain along the track and means on t e carriages for holding separate pieces of work at one end, the' free end of the work being free to move longitudinally but held against angular displacement, and means intermediate the ends of the work associated with4 the chain for supporting the work at spaced pointsthroug out its length. .j

22. In a grinding machine, a track, al plurality of 'grinding wheels arranged therealong, means for conveying yvork along the track into engagement with successive wheels and means `for moving the track and work laterally across thefaces of the wheels in unison with the longitudinal movement ofthe work.

23. In a grinding machine, va track,'-a plutrack into engagement with successive wheels and means for moving the track and work laterall across the faces of the wheels in unison with the longitudinal movement of the work.

24. In a grinding machine, a track, a plurality of grinding wheels arranged therealong, means for conveying work along the track into engagement with successive wheels and means for moving the track and Work laterally across the faces of the Wheels in unison with the longitudinal movement of the work and manually controlled means for holding selected grinding Wheels out of operative relation with the work independent of the operation of the balance of the machine.

25. In a grinding machine, a track, a plurality of grinding wheels arranged therealong, means for conveying a continuous series of successive pieces of work along the track into engagement with successive wheels and means for moving the track and work laterally across the faces of the Wheels in unison with the lon itudinal movement of the work, and manua l controlled means for holding selected grin ing wheels out of operative relation with the Work independent of the operation of the balance of the machine.

Signed at Chicago, county of Cook and State of Illinois, this 9th day of May, 1924.

LEWIS P. HALLADAY. 

